class SIM {
	long number;
	SIM(long number) {
	this.number=number;
	}
	long getNumber() {
	return number;
}
}
class MT {
	SIM sim;
	void setSIM(SIM card) {
	sim=card;
	}
	long lookNumber() {
	return sim.getNumber();
	}
}
public class p75 {
	public static void main (String args[]) {
	SIM simOne=new SIM(13889776509L);
	MT mobile=new MT();
	mobile.setSIM(simOne);
	System.out.println("手机号码:"+mobile.lookNumber());
	SIM simTwo=new SIM(15967563567L);
	mobile.setSIM(simTwo);
	System.out.println("手机号码:"+mobile.lookNumber());
	}
}
